More Images Polish-Lithuanian Commonwealth
The Polish–Lithuanian Commonwealth, formally known as the Kingdom of Poland and the Grand Duchy of Lithuania and also referred to as Poland–Lithuania or the First Polish Republic, was a federative real union between the Kingdom of Poland and the Grand Duchy of Lithuania, existing from 1569 to 1795. This state was among the largest and most populated countries of 16th- to 17th-century Europe. At its peak in the early 17th century, the Commonwealth spanned nearly 1,000,000 km² and supported a multi-ethnic population of approximately 12 million as of 1618. The official languages of the Commonwealth were Polish and Latin, with Catholicism as the state religion. The Commonwealth was established as a single entity by the Union of Lublin on 1 July 1569. The two nations had previously been in a personal union since the Krewo Agreement of 1385 and the subsequent marriage of Queen Jadwiga of Poland to Grand Duke Jogaila of Lithuania, who was crowned jure uxoris King of Poland. Wikipedia